U.K. house prices fell in August for a second month as demand declined amid a "fragile" market, Hometrack Ltd. said.

Values slipped 0.1 percent from July, when they also fell 0.1 percent, the London-based property-research company said in a report today. A measure of demand fell for a third month, dropping 1.3 percent, while a gauge of supply rose 0.8 percent